M-CHAT-R
Pronunciation: EM-chat-R
Also written as: M-CHAT-R — Modified Checklist for Autism in Toddlers, Revised
Modified Checklist for Autism in Toddlers, Revised, a screening tool for autism spectrum disorder in children 16-30 months of age.
Full Definition
The Modified Checklist for Autism in Toddlers, Revised (M-CHAT-R) is a two-stage parent-report screening instrument designed to identify children between 16 and 30 months of age who may be at risk for autism spectrum disorder (ASD). The tool consists of 20 yes/no questions about the child's behavior, with a follow-up interview (M-CHAT-R/F) for children who screen positive on the initial questionnaire. The M-CHAT-R has improved specificity compared to earlier versions, reducing false positives while maintaining sensitivity for detecting children who may benefit from early autism intervention. It is recommended by the American Academy of Pediatrics for routine autism screening during well-child visits.
Usage
Usage note: Always include the 'R' to distinguish from the original M-CHAT. Follow positive screens with clinical assessment.
In Context
- "The M-CHAT-R screening at the 18-month visit identified three areas of concern requiring follow-up assessment." — pediatric screening documentation
- "Positive M-CHAT-R results should prompt referral for comprehensive developmental evaluation, not immediate diagnosis." — clinical practice guideline